What does OBN stand for?

Bentley Boats LLC, Ooltewah, TN - Manufacturer code for watercraft hull identification number (USCG)

Oban - Scotland - Airport symbol (OAG)

Obninsk - Former USSR - Seismograph station code, US Geological Survey (SEIS)

Occult Blood Negative - Medicine (DAVI)

Office Balancing Network - Telecommunications (TEL)

Office of Biochemical Nomenclature - NAS-NRC

On-Board Navigation

Open Business Network (XSAL)

Open Library Network (SAUS)

Optical Broadband Network (SAUS)

Out-of-Band Noise